Pump



Fil u y 25, 1925 2 Sheets-Sheet 2 67 [/VVEf/TOR DW/GHT H BAEA/WELLATTORMEY.

Patented Sept. 6, 1927.

UNITED STATES PATENT ,OFFIcE.

DWIGHT n. namvwnn'n, or 'rar'r, CALIFORNIA, assrdnoa, 'ro'axnr.sonmom-1m COMPANY, 011' LOS ANGELES, CALIFORNIA, A conrona'rrou orCALIFORNIA.

Application filed July 25, 1925. Serial No. 46,018.

My invention relates to oil well pumps, and it has todo particularlywith a novel form of plunger. v

In the oil well'ndustry it is common prac I tice to secure a pump barrelto the lower end of a pump tubing and near the bottom' of awell. A pumpplunger is free .to move vertically inside the barrel and a string ofsucker rods is secured to the upper part of ated, and the pump plungercarries a'workingvalve.

It has been found that when all other conditions remain the same, ahigher efficiency of the pump is usually acquired when the standingvalve and the working .valve are close together.

- It is an object of my invention to prov de a ump in which the standingand working va ves are quite close together.

It is another object of my inventlon to provide a ump having a noveldesign comprising a ew parts which maybe readily put to ether and takenapart.-

t is an object of this invention to bevel the upper end of the plungersleeve for re- .moving sand from the inner face of the barrel.

It is quite .an advanta e to have the standing valve cage remova le fromthe barrel with the plunger, for the purpose of 1nspection and repair,and also for drammg the pump tubing. ,If the standlng valve cage is notremovable with the plunger of the pump a separate fishing job isrequired which takes considerable time and is somewhat expensive.

It is an object of my invention to provide a pump having a device forpullmg the standing valve cage with the plunger.

In a large proportion of the wells from which oil is pumped the oilcontains a considerable quantity of sand which tends to settle in anycavity or recess in the pump ropriate mechanism and the mechanism inwhich a strong current of oil 1s not practicall continuously flowing.Any mechanism sucli whlch Iv use for connecting the plunger to thestanding val'veof my pump, must neces-'- as the interlocking device.

sarily' be kept free from sand which, if

deposited thereon, would render it inoperaive.

It is a definite feature ofmy pump that the bayonet slots utilized inthe means for connecting the pump plunger to the standing valve areconstantly washed with oil .exhausted from the standing valve into thepump chamber so that no sand ma be deposted 1n these'bayonet slots anduild up a barrier therein so as to prevent a union between the plun erand standing valve when this may be desired.

Other objects and advantages of this invention will be made manifesthereinafter.

Referring to the two sheets of drawings in which I illustrate myinvention,

Fig. 1 is a vertical cross section taken through a pump embodying thefeatures of my invention.

Fig. 2 is a section taken on the line 2-2 of Fig. 1.

Fig. 3 is a section taken on the line 3-3 of Fig. 1. y

Fig. 4 is an enlarged fragmentary section taken through the lower end ofthe plunger of the pump shown in Fig. 1.

Fig. 5 is a cross section taken on the 55 of Fig. 4.

Fig. 6 is an enlarged partially sectioned V ew of a bottom bushing of myinvention.

Flg. 7 is a bottom plan view of the plunger of the pump of my invention.

Fig. 8 is a view of a lift body of my invention which is secured to astanding valve cage of the pump shown in Fig. 1, this view being takensubstantially as mdicated by an arrow 8 of Fig. 3.

As shown in Fig. 1, 11 denotes a pump barrel and 12 denotes a pumpplunger. The pump barrel 11 comprises an outer shell 13 having a lowercollar 14 secured to the lower end thereof. Inside'the shell 13 is aliner 15 which is accurately ground to proper size and properly securedinside the shell 13 be tween the lower collar 14 and an uppercollar (notshown) of'the barrel 11.

A standing valve cage 16 has a conical porline tion 17 which rests in aconical seat 18 provided by the. lower collar 14. A standing valve ball19 is adapted to rest on a seat'21 for closing a passage 22 extendingthrough the standing valve body 16. I

The plunger 12 of my invention comprises a plunger sleeve 24 WlllChthreads at its lower end 25 on a central threaded portion 26 of a botombushing 28. The upper end of the sleeve is beveled at 27 to form a sharpedge which scrapes sand from the liner 24, pro: venting the sand fromlodging between the liner and the sleeve. A lower end 29 of the pumplunger sleeve 24 engages an upper an nular ace 30 of a skirt portion 31which extends downwardl from the central threaded portion 26 of t ebottom bushing 28. Extending upwardly from the central threaded portion26 of the bottom bushing 28 is an upper threaded projection 33 whichextends inside the pump plunger sleeve 24. A working valve cage 35placed inside the plunger sleeve 24 has a threaded lower portion 36which is secured on the upper threaded projection 33. of the bottombushing 28. A threaded pin 38 is formed at the upper ends of arms 39 ofthe cage 35, which pin 38 is threaded into a socket 41 of a sub-coupling42. The sub-coupling 42 is secured to the lower end of a string ofsucker rods 43, this string of sucker rods 43 extending upwardly,

through the well to the surface of the ground, attaching to a ,walkingbeam and serving to reciprocate the plunger 12 inside the barrel 11. Anannular ledge 45 of a seat member 44 is clamped between an upper annularface 47 of the bottom bushing 28 and an annular shoulder 48 of theworking valve cage 35. A lower cylindrical ortion 50 of the seat member44 extends llltO the u per end of the threaded projection 33 and engagesa cylindrical face 51, whereas an upper cylindrical portion 52 of theseat member 44 extends inside the lower part of the working valve cage35 and engages an inner cylindrical face 54 thereof. A working valveball 55 is carried between the legs 39 of the cage 35, this ball beingadapted to engage the upper end of the seat member 44 for closing apassage 56 therethrough.

As clearly. shown in Fig. 4, the skirt 31 has a cylindrical bore 60which is gradually enlarlged at 61 at the lower end of the skirt 31.xtending into the bore 60 in radial directions and in diametral opposedpositions are cylindrical engagers 63.

As clearly shown in Fig. 8, a threaded portion 65 of a body 66 issecured in an upper threaded portion 67 of the. stand ing valve cage 16.Hooks 68 of thebody 66 are arranged on each side of a diametral channel78. The books 68 comprise rigid arms 71, from the upper ends of whichthere extend. bridge portions .72. Extending downwardly from the ends ofthe bridge portions 72 are resilient arms 73 having enlargements 74formed at the lower end thereof. Slots 76 are provided between therigidand resilient arms 71 and 73, below the bridges 72. The hooks 7 68have semi-cylindrical outer faces 77 which are formed on a radiusslightly smaller than that of the cylindrical bore 60 of the skirt 31 sothat the hooks 68 may enter thereinto.

During the operation of the pump just described, the plunger 12 isreciprocated bymeans of the string of sucker rods 43. During the downstroke of the plunger the working valve ball 55 is removed-from its 80seat, and oil in the lower end of the barrel 11 passes through theopening in the bottom bushing 28 to a point above the ball 55. Duringthe up stroke of the plunger,

the ball 55 is seated and oil above the working valve is elevated.During this time the ol passes from the exterior of the barrel 11 to theinterior thereof below the plunger'12. The standing valve ball 19 isremoved from its seat and oil passes into the barrel through the passage22 of the standing valve cage 16. The standing valve ball 19 is closedduring the downstroke of the plunger and is open during the up stroke ofthe plunger, whereas the working valve ball 55 is seated during the upstroke of the plunger and unseated during the downstroke of theplunger.

As previously mentioned, it is very desirable to have the working valvecage removable with the plunger. When it is desired to remove theplunger 12 and the standin valve cage 16, the plunger is loweredlbeyondits normal stroke so that the hooks 68 enter the cylindrical bore 60 ofthe skirt 31. The engagers 63 extend into the diametral chan- 105. nel78 formed between the hooks 68. When the plunger has been loweredsufficiently to move the. en agers 63 to the lower end of the diametralchannel 78, the plunger is rotated and lifted very slowly. This movesthe engagers 63 into the slots 76 of the hooks 68.

In passing into the slots 76, the engagers 63 engage the enlargements 74of the resilient arm 7 3. thus springing the arm 73 outwardly untilthese engagers pass by these enlarge I15 ments 74, at which time theresilient arms return to normal position. The resilient arms andenlargements prevent an accidental disconnection between the engagers 63and the hooks 68. When the engagers rest in the hooks 68, the standingvalve' cage 16 may be readily lifted with the plunger 12 to the surfaceof the ground.

The construction of my invention, as shown clearly in Fig. 1, permitsthe standing valve and the ,working valve 'tobe situated close togetherso that the efliciency of the pump maybe as high as possible. Theconstruction of the plunger of my invention is quite simple.- As isobvious from the drawings, it requires but few parts which are of noveldesign and may be readily"assembled and disassembled.

I claim as my invention:

1. In a deep well pum the combination of: a barrel; -a plunger s idablydisposed in said barrel; a standing valve removably seated adjacent thelower portion of said barrel, said standing valve having a body with afluid passage, a valve member in said passage, and a cap provided uponthe upper portion of said body, a fluid passage extending entirelythrough said cap in an axial direction; locking means formed on said capabout said axial passage; and interlocking means formed upon saidplunger and adapted to engage said locking means for lifting saidstanding valve with said plunger.

In a deep well pump, the combination of: a barrel; a plunger slidablydisposed in said barrel; a standing valve removably seated adjacent thelower portion of said barrel,sa1d standing valve having a body with afluid passage, a valve member in said passage, and a cap provided uponthe upper portion of said body, a substantially tubular upward extensionbeing provided centrally upon said cap, said extension connecting withsaid fluid passage to provide an upward continuation thereof; lockingmeans formed upon said extension; and interlocking means formed uponsaid plunger and adapted to engage said locking means for lifting saidstanding valve with said lunger.

'3. In a deep well pump, the com ination of: a barrel; a plungerslidably disposed in said barrel; a standing valve removably seatedadjacent the lower portion of said barrel, sald standing valve having abody with a fluid passage, a valve member in said passage, and a capprovided upon the upper portion of said bod a substantially tubularupward extension ing provided centrally upon said cap, said extensionconnectin with said fluid passage to provide an upwar continuationthereoI, there being a bayonet 'slot formed in said tubular extension;and

a locking pin provided upon said plunger and adapted to be positioned insaid bayonet slot to permit the lifting of said standing valve by saidplunger.

4. In a deep well pump, the combination of: a barrel; a plunger slidablydisposed in said barrel; a standing valve removably seated adjacent thelower portion of said barrel; locking means formed upon said standingvalve; and interlocking means formed upon said plunger and adapted toengage saidlocking means for lifting said standing valve with saidplunger, there being a fluid discharge opening in said standing valvewhich directs fluid dischar ed therefrom in a manner to wash saidlocking means and substantially prevent accumulation of solids therein.

In testimony whereof, I have hereunto set my hand at Taft, California,this 14th day of July, 1925.

DWIGHT H. BARNWELL.

